Sun Valley is a census-designated place (CDP) in Washoe County, Nevada, United States. The population was 19,299 at the 2010 census. It is north of Reno and is part of the Reno–Sparks Metropolitan Statistical Area.
The community is located within Sun Valley approximately three miles north of Reno on Nevada State Route 443.
According to the United States Census Bureau, the CDP has a total area of 14.9 square miles (38.6 km2), all land.
As of the census of 2000, there were 19,461 people, 6,380 households, and 4,816 families living in the CDP. The population density was 1,297.2 inhabitants per square mile (500.9/km²). There were 6,703 housing units at an average density of 446.8 per square mile (172.5/km²). The racial makeup of the CDP was 79.78% White, 2.20% African American, 1.93% Native American, 2.21% Asian, 0.62% Pacific Islander, 9.51% from other races, and 3.74% from two or more races. Hispanic or Latino of any race were 21.13% of the population.
There were 6,380 households out of which 40.7% had children under the age of 18 living with them, 54.3% were married couples living together, 13.7% had a female householder with no husband present, and 24.5% were non-families. 15.6% of all households were made up of individuals and 4.4% had someone living alone who was 65 years of age or older. The average household size was 3.05 and the average family size was 3.39.